N2WS Cloud Protection Manager - N2WS is the leading Enterprise-class disaster recovery, and backup solution specifically made for Amazon EC2 servers.
imapsync - Console-based utility for migrating IMAP mailboxes.
Bacula Enterprise - A physical, virtual and cloud data center backup software for data centers. Bacula Enterprise Edition is the best open source backup software.
Gmvault - Backup the emails in your Gmail account.
CloudEndure - CloudEndure provides cloud migration and cloud disaster recovery for any application.
Cryoserver - Cryoserver is an all-in-one email archiving solution that empowers you to preserve your email in a tamper-evident archive, making you transform your data into a useful archive for everyday use.